Hello bigstar
I checked the following check boxes:
Preferences > General > Remote edit > last check mark.
Checked also in Options > General > View and edit files > File associations > items in Association list
and of course I turned logging ON

I turned LOGS OFF now and everything works, but the same behaviour as before: when loading the (external) file for editing no backup shows up after the first and subsequent edits. Only when I "re-open" the file (right click on the file name, choose "edit") the first and subsequent backups are made. I use Notepad++ for my editing needs.

English isn't my native language, so I hope I've been clear enough ;-)

The backup is created after your first save of a remote edit, subsequent saves do not automatically create backups, this was done to minimize the amount of backups created. (it was also done on the basis that most people keep the file open between edits and just save the file with most editors provide multiple levels of undo)

So the typical usage based on using Notepad++ might be as followed:

* Edit a remote file

(The user edits the file within Notepad++ and save the file; without closing Notepad++ or the file)
* FlashFXP detects the local file has changed.
* FlashFXP automatically uploads (and creates) a backup of the original file.
* FlashFXP uploads the modified file.

(the user makes additional edits within Notepad++ and saves the file again)
* FlashFXP detects the local file has changed.
* FlashFXP uploads the modified file.

If at any time you use the remote edit (right-click Edit) feature to re-open the remote file for editing then it will then create a new backup on the first save.